completely, although many people may develop sinus headache again in the future.
Complications of sinus headache are not common. Rarely, an untreated sinus infection can erode through the bones and involve adjacent structures, including the eye socket or brain, potentially causing pain and swelling of the eye or symptoms of meningitis or encephalitis. Infection that spreads to the blood vessels in the area of the sinuses can cause inflammation andblood clot . The cavernous sinus is a collection of veins located near the sphenoid sinus that can potentially become infected and form blood clots.